September Summary
Near average temperature and rainfall, below average wind run.
(September compared to my records from the past 10 years.)
- This September close to my average temperature with 9.7C, my September 10 year average is 9.8C
- The warmest temperature was 26.4C, a new September record. My previous record was 25.9 set in 2016
- The coldest temperature was -1.4C, the lowest September temperature I've recorded is -2.5C in 2009.
- Four days recorded a temperature of 0C or below, my average is 2.
- Two days failed to reach 10C maximum daily temperature, my average is 1.
- Nineteen days reached or exceeded 15C, my average is 16.
- Six days reached or exceeded 20C, my average is 5.
- One day reached or exceeded 25C, my average is 0 though 2 days did in 2017 and 1 in 2008.
- Wind run was 88% of my average of 4600km with 4077km.
- The windiest September was 2016 with 5291km.
- The barometer recorded near average average pressure for the month with 1009.2hPa. My average is 1010.0hPa.
- Record high pressure was recorded this September with 1041.7hPa, my average maximum pressure is 1031.1hPa
- Rainfall was near my average expected total of 41.9mm with 42.4mm.
- The wettest September in the past 10 years is 2014 with 70.5mm.
- The driest September in the past 10 years is 2009 with 24.7mm
September 2019 Summary Temperature | |
---|---|
Mean | 9.7 C |
Mean Maximum | 15.9 C |
Mean Minimum | 4.0 C |
Maximum High | 26.4C (29th) |
Maximum Low | 8.3 C (5th) |
Minimum High | 9.0 C (6th) |
Minimum Low | -1.4 C (8th) |
Wind Speed and Direction | |
Maximum Gust | 46 km/h (25th) |
Mean | 6.0 km/h |
Wind Run | 4077 km |
Max Daily Windrun | 358 km (6th) |
Prevailing Direction | East North East |
Barometer | |
Maximum | 1041.7 hPa (20th) |
Minimum | 984.3 hPa (25th) |
Mean | 1009.2 hPa |
Max Daily Change | `+32.9 hPa (17th) |
Rainfall | |
Days with Measured Rainfall (0.2mm or more) |
10 |
Max Daily Rainfall | 9.8 mm (4th) |
Monthly Rainfall | 42.4 mm |
Humidity | |
Maximum | 98 % (5th) |
Minimum | 28 % (17th) |
September Daily Observations | ||||||||||||
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Temperature | Wind | Rainfall | Barometer | |||||||||
Date | Min | Max | Mean | Mean (Km/h) | Gust (Km/h) | Run (km) | Prevailing Dir | 10 Minute Max (mm) | Total (mm) | Min (hPa) | Max (hPa) | Change (hPa) |
1 | 1.2 | 21.2 | 10.6 | 2.9 | 28 | 66 | East Nth East | 0 | 0 | 1016.0 | 1023.6 | -7.6 |
Sunny and mild with light winds tending NE. | ||||||||||||
2 | 3.9 | 15.3 | 10.2 | 8.1 | 39 | 185 | East Nth East | 0 | 0 | 1017.3 | 1022.5 | -5.2 |
Sunny with a freshening NE wind in the afternoon. When does spring officially start in NZ? It's complicated |
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3 | 3.4 | 15.7 | 9.6 | 3.4 | 23 | 76 | East Nth East | 0 | 0 | 1014.8 | 1018.6 | -3.8 |
Fog and low cloud in the morning clearing to a sunny day with few clouds. Light NE winds. | ||||||||||||
4 | 6.7 | 11.0 | 9.8 | 7.0 | 31 | 159 | East Nth East | 0.8 | 9.8 | 997.9 | 1014.8 | -16.9 |
Low cloud and drizzle from midday with showers in the afternoon, NE wind. | ||||||||||||
5 | 8.3 | 10.4 | 9.1 | 9.9 | 35 | 227 | South West | 0.2 | 1.2 | 988.9 | 997.5 | -8.6 |
Light rain and drizzle in the morning clearing for a while but returning later in the afternoon. Southerly winds. | ||||||||||||
6 | 6.5 | 9.0 | 7.9 | 15,6 | 46 | 358 | South West | 1.2 | 9.0 | 988.6 | 1001.4 | +12.8 |
Overcast with showers and southerly winds. | ||||||||||||
7 | 0.0 | 10.9 | 5.9 | 5.2 | 30 | 120 | South Sth West | 0.4 | 0.6 | 1001.3 | 1005.3 | +4.0 |
Showers clearing by dawn with cloud breaking to a sunny afternoon. Cool southerly winds. | ||||||||||||
8 | -1.4 | 9.6 | 4.1 | 4.0 | 22 | 90 | South Sth West | 0 | 0 | 1002.0 | 1006.5 | +4.5 |
Morning frost. Overcast from early morning with light showers later. Light southerly winds. | ||||||||||||
9 | 2.8 | 10.4 | 5.9 | 3.1 | 24 | 71 | East | 0 | 0 | 1005.9 | 1008.1 | -2.2 |
Overcast and cold with variable winds in the morning turning NE in the afternoon. Snow risk to North Island high routes; temperatures plummet in south |
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10 | 2.6 | 11.5 | 7.5 | 7.9 | 38 | 172 | East Nth East | 0 | 0 | 1000.0 | 1007.3 | -7.3 |
Sunny with fresh cool Ne wind. | ||||||||||||
11 | 1.9 | 12.8 | 6.9 | 5.6 | 28 | 128 | South Sth West | 0 | 0 | 999.6 | 1010.4 | +10.8 |
Morning cloud breaking to a sunny afternoon with a cool southerly wind turning NE in the evening. | ||||||||||||
12 | 1.4 | 20.5 | 11.7 | 4.8 | 34 | 109 | East Nth East | 0 | 0 | 1002.0 | 1009.7 | -7.7 |
Variable high cloud, mild northerlies from midday. | ||||||||||||
13 | 6.9 | 18.2 | 11.2 | 6.6 | 37 | 151 | South Sth West | 0.2 | 1.2 | 998.2 | 1013.5 | +15.3 |
Mild northerly winds in the morning followed by a cold southerly change around 11am with a few afternoon showers. | ||||||||||||
14 | 5.3 | 10.2 | 7.8 | 2.7 | 26 | 60 | East | 0.4 | 8.8 | 1004.9 | 1013.6 | -8.7 |
Overcast with low cloud and mist. light rain and drizzle throughout the day. Light winds. | ||||||||||||
15 | 7.2 | 12.8 | 9.1 | 6.7 | 25 | 152 | South West | 0.2 | 3.4 | 1002.4 | 1005.4 | -3.0 |
Overcast with low cloud, mist and drizzle in the morning. Cloud breaking to a mostly sunny afternoon with southerly winds turning NE. | ||||||||||||
16 | 4.3 | 21.0 | 13.3 | 5.1 | 44 | 117 | East Nth East | 0 | 0 | 993.2 | 1004.7 | -11.5 |
High cloud increasing from midday, mild northerly winds from late morning. | ||||||||||||
17 | 4.6 | 17.8 | 12.0 | 7.1 | 44 | 162 | West Nth West | 0 | 0 | 993.4 | 1026.3 | +32.9 |
Cloud increasing in the afternoon with a few spots of rain later. Nor'west winds turning NE in the afternoon. | ||||||||||||
18 | 3,3 | 15.1 | 8.7 | 4.5 | 22 | 104 | East Nth East | 0 | 0 | 1026.3 | 1032.7 | +6.4 |
Sunny with thin high cloud, Cool NE wind. | ||||||||||||
19 | -0.4 | 16.9 | 8.2 | 3.9 | 34 | 88 | East Nth East | 0 | 0 | 1032.5 | 1036.8 | +4.3 |
Morning frost, sunny with some high cloud in the afternoon with NE wind freshening. Extremely rare stratospheric warming shows no sign of ending |
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20 | 2.8 | 15.7 | 9.1 | 3.8 | 23 | 86 | South Sth West | 0 | 0 | 1036.7 | 1041.7 | +5.0 |
Morning cloud breaking to a sunny afternoon with light southerly winds turning NE later in the afternoon. | ||||||||||||
21 | 7.1 | 16.9 | 10.5 | 7.2 | 29 | 164 | East Nth East | 0 | 0 | 1034.3 | 1040.0 | -5.7 |
Morning low cloud clearing to a sunny afternoon with NE wind. | ||||||||||||
22 | 7.3 | 14.4 | 10.2 | 8.5 | 39 | 194 | East Nth East | 0 | 0 | 1016.6 | 1034.3 | -17.5 |
Low cloud breaking in the afternoon with sunny intervals and freshening NE winds. | ||||||||||||
23 | 4.0 | 21.5 | 12.3 | 4.5 | 35 | 103 | East Nth East | 0 | 0 | 999.3 | 1016.5 | -17.2 |
Variable winds turning mild northerly in the afternoon with high cloud breaking. | ||||||||||||
24 | 5.8 | 17.6 | 10.3 | 4.9 | 26 | 112 | South Sth West | 0.6 | 3.2 | 994.3 | 999.2 | -4.9 |
Sunny morning. Cloud increasing from midday with showers in the afternoon. Light southerly winds in the morning, variable breezes in the afternoon. | ||||||||||||
25 | 1.8 | 16.9 | 7.5 | 5.7 | 46 | 131 | East Nth East | 0.6 | 4.0 | 984.3 | 995.6 | -11.3 |
Cloud increasing from midday with showers from late afternoon with a cold southerly change. | ||||||||||||
26 | -1.3 | 18.3 | 8.8 | 7.0 | 38 | 160 | West Nth West | 0.2 | 0.2 | 991.7 | 999.2 | -7.5 |
Morning frost. Sunny with mild northerly winds from late morning. | ||||||||||||
27 | 5.6 | 17.9 | 10.7 | 4.2 | 24 | 95 | East Nth East | 0 | 0 | 999.4 | 1007.3 | +7.9 |
Morning cloud breaking to a sunny afternoon with NE winds. | ||||||||||||
28 | 4.8 | 21.8 | 12.6 | 5.4 | 40 | 124 | North Nth West | 0 | 0 | 1003.8 | 1006.7 | +2.9 |
Overcast with nor'west winds | ||||||||||||
29 | 6.4 | 26.4 | 16.3 | 5.2 | 37 | 114 | North Nth West | 0 | 0 | 999.8 | 1007.2 | -7.4 |
Sunny with few clouds, warm northerly winds from late morning. | ||||||||||||
30 | 6.2 | 18.3 | 12.6 | 8.1 | 36 | 185 | South Sth West | 0.2 | 0.8 | 992.9 | 1001.5 | +8.6 |
Cloudy with mild northerly winds turning colder southerly by late morning with showers. |